class Student(object):
    # 添加了__在前面的成员就成为了私有成员
    def __init__(self,name,age):
        self.__name = name
        self.__age = age
    def _print_stu(self):
        print("name: %s,age: %d" % (self.__name,self.__age))

s = Student("ajck",21)

# print(s.name)
# print(s.age)

s._print_stu()